The roller-coaster experience of recent years has highlighted the fact that commodity price fluctuations are an integral part of the global economy.1 During 2007 and the first half of 2008, global food prices rose by more than 50 percent and fuel prices doubled. Then, when the financial crisis hit in late 2008, these prices plummeted by 30 and 50 percent, respectively, before rising again sharply in late 2010 and early 2011 (Figure 4.1).
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